Hello,
If Earth were to suddenly stop rotating, the acceleration due to gravity at the North Pole would not change. This is because the centripetal force produced by Earth's rotation does not affect the poles. At the equator, Earth's rotation exerts a centrifugal force that partially reduces the apparent gravity. But at the North Pole, there isn't one such centrifugal force because Earth's axis of rotation passes through the poles, so its acceleration due to gravity is the same as the standard value of about 9.8 m/s² .
Hence, if Earth were to stop rotating altogether, the only places affected would be the ones far away from the poles where without that rotation, the effective gravitational force would increase. At the North Pole though, gravity doesn't.
Question : Which of the following is correct about uniform acceleration?
Option 1: An object moving on a frictionless surface can gain uniform acceleration.
Option 2: An object in free fall is an example of uniform acceleration.
Option 3: An object moving with constant speed is an example of uniform acceleration.
Option 4: The motion of a spring is an example of uniform acceleration.
Question : The mass of a body measured by a physical balance in a lift at rest is found to be 'm'. If the lift is going up with acceleration 'a', its mass will be measured as:
Option 1: m(1-a/g)
Option 2: m(1+a/g)
Option 3: m
Option 4: zero
Question : If a body moves with a constant speed in a circle:
Option 1: no work is done on it
Option 2: no force acts on it
Option 3: no acceleration is produced
Option 4: its velocity remains constant
Question : An object is in static equilibrium when it is ______.
Option 1: at rest
Option 2: moving in a circular path
Option 3: moving with uniform velocity
Option 4: acceleration at high speed
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